Measuring ‘Scaled’ PDF Images of Plans and Drawings
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Note that the drawing images must have been enabled to be measured.
The tools are only available when viewing through Adobe, not through the browser viewer.
Your PC may be set up so that images open in the Browser.
To change this, follow the instructions at the end of this document.
Once you have opened a drawing in Adobe Reader:
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To rotate the image right - click Control, Shift and the plus keys together
To rotate the image left – click Control, Shift and minus key together
You may need to zoom in to at least 50% size to read the scale for the part of the drawing you wish
to measure. Many of the A0 drawings on our website have different objects at different scales so
you will need to change the scale to suit.
Measuring
For older versions of Adobe there may be a small box with a ruler in it, on the screen.
If not, click the EXTENDED button in the right hand side of the tool bar to bring up a list of
extended features and choose Measuring Tool.
For Adobe Reader XI
From the Tools Menu, choose Show Measuring Toolbar and the toolbar will appear on the screen.
(The screen shot below shows some of the help text available.)
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You can drag the toolbar
around
To set or change the scale
Select the line, triangle or shaded triangle in the Measuring toolbar depending on what you want to
measure.
Click the first point you wish to measure from
Before you drag the cursor to the next point, right click – a list of options should appear
Choose Change Scale Ratio
This box should appear
Enter the scale you want for this particular measurement. The example is for a scale of 1:200
Click OK
Continue with measuring.
Double click finishes the selection of points. You can also finish a measurement by rightclicking/Control-clicking and choosing Complete Measurement from the context menu.
To cancel an operation before you have finished, hit the Esc key
Then, for further measuring, do any of the following:
Select the Distance tool
to measure the distance between two points. Click the first
point, move the pointer to the second point, and then double click. The measurements appear in
the tool dialog box.
Select the Perimeter tool
to measure a set of distances between multiple points. Click each
point you want to measure. Then, double-click the last point, or hold the pointer over the last point
and click.
Select the Area tool
to measure the area within the line segments that you draw. Click each
point you want to measure. After you have clicked at least two points, click the first point to
complete the area measurement.
Note: You can save a copy of the image with the added measurements.
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Scales
Drawing Scale
Measuring Scale
1:20
1cm = 0.2m
1:25
1cm = 0.25m
1:50
1cm = 0.5m
1:100
1cm = 1m
1:200
1cm = 2m
1:500
1cm = 5m
1:1000
1cm = 10m
1:1250
1cm = 12.5m
1:2500
1cm =25m
1:5000
1cm = 50m
1:10000
1cm = 100m
Setting Adobe Reader XI so it opens PDF images instead of the Browser
The settings are made in the browser, but to read the instructions for doing this you will need to
open Adobe Reader.
Open Adobe Reader
Select Edit Preferences
From the Categories list select Internet
Click the link How to set up your browser to use Adobe products to view PDF
documents
Note the instructions for the browser you use.
Open your browser and follow the instructions for setting that up.
After this if you get an error message when you click a PDF from a browser and find that it still
opens in the browser, you may have to disable a setting in Adobe Acrobat Reader itself.
So
Open Adobe Reader
Select Edit Preferences
From the Categories list select Internet
Click Internet settings
Choose Programs tab
Select Manage add-ons
Under Show: choose All add-ons
Under Adobe Systems Incorporated, Highlight Adobe PDF Reader
and click the Disable button at the bottom right of the screen
Close down the Adobe Reader application
Also close down any internet sessions you have open
(For earlier versions of Adobe Reader, this is where you would enable Adobe Reader to open a
pdf file instead of the browser.)
Last Edit 10/06/2014
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